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Related Concept Videos

Red Algae01:23

Red Algae

38
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
38
Other Algae01:19

Other Algae

30
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
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Overview of Algae01:28

Overview of Algae

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The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
25
Green Algae01:21

Green Algae

26
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
26

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Related Experiment Video

Updated: Jul 12, 2025

Analysis of Fatty Acid Content and Composition in Microalgae
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Tropical Red Macroalgae Cultivation with a Focus on Compositional Analysis.

Simona Augyte1, Neil A Sims1, Keelee Martin1

  • 1Ocean Era, Inc., Kailua-Kona, HI 96740, USA.

Plants (Basel, Switzerland)
|October 28, 2023
PubMed
Summary
This summary is machine-generated.

This study optimized onshore seaweed cultivation using deep seawater for nutrient and carbon sources. *Agardhiella subulata* showed highest productivity, offering a sustainable, carbon-negative biomass for bioenergy and feed applications.

Keywords:
aquaculturebiorefinerycarbon capturecompositional analysisfeedstockmacroalgaepolysaccharides

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Area of Science:

  • Marine Biology
  • Biotechnology
  • Sustainable Agriculture

Background:

  • Developing carbon-efficient bioenergy feedstocks and livestock feed is crucial.
  • Sustainable nutrient supply for macroalgae cultivation requires innovative approaches.

Purpose of the Study:

  • To optimize onshore macroalgae cultivation using deep seawater for nutrient and carbon.
  • To evaluate the growth and yield of *Agardhiella subulata* and *Halymenia hawaiiana*.

Main Methods:

  • Onshore cultivation of two red algal species (*A. subulata*, *H. hawaiiana*).
  • Utilized influent deep seawater as the primary nutrient and carbon source.
  • Assessed growth rates and biomass yields under varying deep seawater concentrations.

Main Results:

  • *Agardhiella subulata* achieved the highest productivity (247.5 g m⁻² day⁻¹) with 10% deep seawater.
  • *Halymenia hawaiiana* yielded up to 63.3 g m⁻² day⁻¹ with 10% deep seawater.
  • Biomass carbon content was 30-40% of ash-free dry weight, indicating efficient CO₂ capture.

Conclusions:

  • Onshore cultivation with deep seawater is a viable strategy for high-yield seaweed biomass production.
  • Optimized seaweed farming can provide carbon-negative biomass for biorefineries, bioenergy, and feed.
  • Scaling seaweed cultivation supports global sustainability goals and creates novel biomass sources.